Thank you for that additional information.
It does not sound like you have a STD.
Also, given that you saw a doctor and he found everything to be OK I agree with him:
There is no need for you to worry.
Of course, if you find yourself still freaking out about this then -- by all means -- go back to the doctor and have him run an entire STD panel on you. This way you can stop worrying .
But, if you were my son, I'd tell you that you're OK.
Next time use a condom, if for no other reason than your piece of mind.
Does this make sense to you?
It's safe for you to press the positive feedback button now if you so desire. And, never fear, even after you press that button I'll still be right here to continue helping you, but, as I do work for tips, I want to make sure you are happy before rating me.
Dr. Rick MD FACS